Many Japanese companies hold various training courses for their new employees, and so does Japan Systembank Corp. Here we'll pick up some topics in a serial form from the company's training course for the new recruits held in 2015, and the second edition is about the basic sitting postures in business situations.
For men and women, you sit on the two-third of chairs and you do not lean on the back of them.
For men, please place your fists on your laps.
For women, please fold your hands on your laps.
To correct the round-shouldered posture, you can also use a wall like this.